Child-bride weddings v. prostitution?

From Slate, which features a collection of photographs of a mass wedding of child-brides:

In rural India, young girls of the Saraniya community are often forced to turn to prostitution to support their families—unless they’re married first. These photos document a mass wedding of child brides in the village of Vadia, organized by an NGO in order to save the girls from a life in the flesh trade

The caption for the above photo reads:

Wedding organizers claim the couple won't marry until she turns 18 and he 21, the legal age to marry in India, but it’s more likely they'll tie the knot in less than two years, a more typical length of engagement in rural India.

What a terrible choice for the kids!

Oh, child-"brides" because it is not always that the groom is a child--girls are kids, while the grooms can be much older!

The only good thing here: thankfully, child marriages are very, very rare anymore in India.